Molding machine



Nov. 9 1926.

1.. J. FRU-:DL

MOLDING MACHINE Filed June 30, 1926 INVENTOR ATTORNEY Patented Nov. 9, 1926.

.LQUIS J. .ramen or lCIaWEL,AND. .0am

MQLDING ivrACHINE.

appncationviea June salsas; serfiaino. naalj l5 scribed.

' ln the drawings A Fig. l'is `a .vertical section through theY mold parts on line 1-1 of;Fig. 9.. l

Fig. 2 is a plan View. od the mold with the zo .plunger removed. A

Lig..3 is a bottonrview thereof.

Figf4 is a fragmentary side detail of al mold blade mounting.

Fi g. 5 is a detail view of a trimming blade. Fig. 6 is an end View thereof. Fig. 7 is a detail view of a blade guide block.

Fig. 8 is a perspective view of a molded flower pot. 3U Referring specifically to the drawings, 5 indicates generally the mold shaped interiorly to form the exterior of the article to be molded which may be a flower pot, cup, bowl or other article molded of suitable material such as clay in a plastic condition. In the drawings the mold 5 is shown interiorly shaped to form the exterior of a liower pot indicated at 6, the mold` having a body 7 with an internal lower substantially frustro-conical shaped wall surface 8 and an upper slightly frustrofconical shaped wall surface 9 joined by a ledge 10, an external annular shoulder 11 forming the mouth of the wall surface 9. The mold is supported by a flange 12 thereof secured by bolts 13 to the molding machine base 14.

A base member 16 seating into the lower smaller end of the body 7 internally flanged la-sat 15, has the top surface 17 thereof shaped to form the bottom outside surface of the :flower pot or article to be molded. The base 16 is provided with a boss 19 into which is screw threaded a rod 2O actuated by the molding machine for pushing the base 16 upwardly, ejecting the molded flower pot.

plurality of trimming blades 2l are lchine.

slidably mounted in slots 24 provided in the annular shoulder lland flange 12. 'Bladel guide blocksv 25 are secured Iin'jslots 24 by screw 27. 4"lhef'blazdes 21 have somarczshanlrs 22 and'beveled cutting edges23 which are positioned at 'the inner edge'll of shoulder 11, converging upwardly slightly witlrtlie axis of wall surfaces 8 andi). *The lower projecting ends of the blades 2 1- are supporte'd'iby 'llat springs 28 securiedfby screw 29 and lock' nuts 30' lto' thebottom' sident flangegl2. i if 'l The -`inside of'jthe flowe'rfpotv or. article is formed "by '.a "core "32 y'orplunger axially rotated vand reciprocated'in" relation :to the wall surfaces 8 and 9 by the molding ma- The coref3'2', carriedby/'afishanlr 33 mounted inthe head-"3Toit the molding Inachin'e, has `an` enlarged s'crewth're'aded poir- 'tion 34, ,a 'cylindrical'fportionV35fai1d a substantially frustrofconi'cal shapedbody 136 Vwhichl *forms `^the-.in'rier"side' andbott'om' of -The collar 22 has a lower annular recess 42 into which is press fitted a wearing ring 43 ot extra hard steel having its bottom side 44 in a horizontal plane with the collar concave bottom edges and the top of the body 36.

To operate, a lump of oiled clay is placed in the mold while the plunger is raised and the ejector base is seated in the bottom ot the mold. The rotating plunger is introduced into the mold by the machine mechanism forcing the plastic clay 45 between'the mold and plunger walls, taking the shape of a flower pot as shown in Fig. 1. The clay is picked up and carried around by the rotating plunger', the excess clay forcing outwardly between the top otmold shoulder 11 and the outer lower edge 41 of the pot top forming concave bottom 41 which would leave a fin on the linished pot or article of not removed by the blades which trim away the excess clay. The flat4 tops of the blades are engaged and pressed downwardly against springs 28 `by the wearing rinol bottom 44 providing a smooth contour' of tlie pot topf bodiment of the invention, obviously various of a mold body and core, a collar at the top changes in the proportionsv and details of construction may be made without departing from the spirit and scope of the appended claims.

l. The combination in a molding machine,

of the core, a wearing ring extending around the lower edge of the collar, and a spring Supported trimming blade mounted at the upper edge of the mold` body in position to be engaged and pressed down by said wearlng Pulg.

2.V The combination in a molding machine, of a mold body, a core'operating therein and having a portion. over-hanging the top edge of the .'moldbody, andr a trimming blade spring supported in the Aupper edge of the ymold body and normally projecting above` the same for Contact with the overhanging partof the core.

3. T he combination in a molding machine, of a mold body having a flange at the top, a core co-operating with the body, an upwardly projecting trimn'iing blade mounted in a recess in the flange of the body, and a spring secured to the under side of said flange and pressing upwardly on the trimming blade.

4.-. The combination in a molding machine, of a mold body having recesses in the upper edge thereof, a coreA (2o-operating with said body, trimming blades in said recessess, supporting springs under the trimming blades, and guide blocks inthe recesses, besides the trimming blades.

5. The combination in a molding machine, ot a mold body having a flange at the top with recesses therein, a reciprocating core co-operating with the mold body and having a collar thereon overhanging said recesses,

and a plurality of spring supported trim-y ming blades in said recesses, said blades normally projecting above the flange on the body and adapted to be depressed by the overhanging collar on the core.

In testimony whereof, I do atlix my signature.

f LOUIS .I. FRIEDL. 

